GRACE-A and GRACE-B together
GRACE-A and GRACE-B together
GRACE-A and GRACE-B together
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FGS Workshop 2004, Höllenstein/Wettzell, October 27 - 29, 2004<br />
Reduced-Kinematic POD<br />
Kinematic POD with dynamic information in<br />
order to reduce influence of weak<br />
geometry <strong>and</strong> phase breaks (jumps).<br />
Methods:<br />
• Absolute constraints to the a priori orbit<br />
• Relative constraints between epochs<br />
• Gauss-Markov process<br />
Normal system solution:<br />
• Full normal matrix inversion<br />
(86400 kinematic coordinates for one-day arc)<br />
• L - U factorization<br />
(block tridiagonal system), block forward<br />
elimination <strong>and</strong> back substitution.<br />
Characteristics:<br />
Smoothing effect
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